Cover the entire aquarium bottom with peat plates, or cover only the site where plants will be placed. Cover the plates with 7 to 8 cm of aquarium gravel or substratum, e.g. FERTILPLANT from PRODAC. Put the plants into the tank until they reach the peat plates so that they may easily root. ATTENTION: immerse the peat plates in water for 24 hours before using them in the aquarium. It is not a PPP (plant protection product). This is not a fertilizer.